im just wondering, which faction is good and which is bad? I know in fallout 3 the brotherhood was good and the enclave was bad, but what about this game?

If I had to guess, CL will be the "bad" guys, NCR will be the "good" guys, and the people will be your "neutral" option.

All the factions are more varying shades of gray, and less black and white, though. So there's no knight in shinning armor and evil bad guy twirling his 'stache.

It has been said many times that there will not be black and white only different shades of gray. NCR will be mostly good, and Caesars Leigion mostly bad. The other 2 major factions have not been explained yet.

There is no good or bad, You pick a faction based on merits and your own play-style also taking into account if you agree with their goals and their ways of going about getting them accomplished. Its not like in FO3 where the Brotherhood Of Steel were the good guys and the Enclave are evil. :tops:

People of vegas and...

Well what are the BoS going to be like? Nothing's really been said about them.

Yes I know about the PNV I was just saying that nothing has really been elaborated about them.

You mentioned TWO major factions besides ncr and cl. I'm asking who are those other two? People of new vegas and...

Perhaps and its only my guess someone probly has a real answer but im guessin that the other faction is working for House

Like they should be. Jerks in power armor. Fishing for tech, and laughing at you for being a dumb waster.

Who's the leader or part of the hierarchy for the people of vegas then?

We don't know yet.
I think it'd be cool if it were just a gathering of people who had a same mindset, rather than following a leader.